i just bought a new truck and am needing to put a sub in it. i have a new re sr 12 d4 that i can useenand it will fit but will it work well? the best i can do is 9 inches on the bottom and 5 inches at the top of the box so there wont be much depth, will this matter? i have plenty of power for this sub as im using a sundown1500 ofcourse gained down. or am i better off buyin a new shallow mount sub? this is sealed so i have plenty of room for the rqrd 1 cube.. any help on how to successfully make a truck sound good and get decently loud is appreciated.